Question

The value of molar conductance of $HCl$ is greater than that of $NaCl$ at a particular temperature and dilution because:

• A. molar mass of $HCl$ $<$ molar mass of $NaCl$
• B. The velocity of H${}^{+}$ ions is more than that of Na${}^{+}$ ion.
• C. $HCl$ is acid
• D. ionisation of $HCl$ is more than $NaCl$

Answer 1

Answer: (B)

The velocity of H${}^{+}$ ions is more than that of Na${}^{+}$ ion.

The value of molar conductance of HCl is greater than that of NaCl at a particular temperature and dilution because $u_{H^{+}}>u_{N{a}^{+}}$ (u is the speed of ion).

$H^{+}$ is the lightest ion and thus, possesses maximum velocity among monovalent ions.